Theoretical Study of the Structure and Electronic Properties of Si 3O n -and Si 6O n -(n=1-6) Clusters. Fragmentation and Formation Patterns

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A theoretical study of two series of small clusters, Si 3O n-and Si 6O n -(n=1-6), has been carried out. The minimum energy structures were produced adding an electron to neutral species followed by relaxation at the B3LYP-6-311G(2d) level. The vertical ionization energies (VIEs) were computed using...

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Autor principal: Tiznado, W.
Otros Autores: Oña, O.B, Caputo, María Cristina, Ferraro, Marta Beatriz, Fuentealba, P.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2009
Acceso en línea:Registro en Scopus
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100 1 |a Tiznado, W. 
245 1 0 |a Theoretical Study of the Structure and Electronic Properties of Si 3O n -and Si 6O n -(n=1-6) Clusters. Fragmentation and Formation Patterns 
260 |c 2009 
270 1 0 |m Tiznado, W.; Departamento de Ciencias Químicas, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, AV. República 275, Santiago-Chile, Chile; email: wtiznado@unab.cl 
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506 |2 openaire  |e Política editorial 
520 3 |a A theoretical study of two series of small clusters, Si 3O n-and Si 6O n -(n=1-6), has been carried out. The minimum energy structures were produced adding an electron to neutral species followed by relaxation at the B3LYP-6-311G(2d) level. The vertical ionization energies (VIEs) were computed using the electron propagator theory (EPT) in two approximations, Unrestricted Outer Valence Green Functions (UOVGF) and partial third-order approximation (P3). In the series Si 3O n -the theoretical VIEs of the minimum energy structures agree well with experimental data. For the second series there are not experimental VIEs, and the theoretical results are predictions. The performance of EPT methodologies in conjunction with all-electron or pseudopotentials (PP) calculations is analyzed. The conjunction of P3 and PP approximation proves to be the most efficient and economical methodology to calculate the VIEs of small anionic silicon oxide clusters. In the series Si 6O n -different channels of fragmentation have been calculated. The results suggest that the fragments do not have drastic geometric changes and the anionic fragment corresponds to the atoms where the spin density of the initial large cluster is localized. The Fukui function calculated over selected optimized fragments predicts adequately the interaction between them to form large stable clusters. © 2009 American Chemical Society.  |l eng 
593 |a Departamento de Ciencias Químicas, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, AV. República 275, Santiago-Chile, Chile 
593 |a Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina 
593 |a Departamento de Física, Universidad de Chile, Las Palmeras 3425, Santiago-Chile, Chile 
700 1 |a Oña, O.B. 
700 1 |a Caputo, María Cristina 
700 1 |a Ferraro, Marta Beatriz 
700 1 |a Fuentealba, P. 
773 0 |d 2009  |g v. 5  |h pp. 2265-2273  |k n. 9  |p J. Chem. Theory Comput.  |x 15499618  |t Journal of Chemical Theory and Computation 
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856 4 0 |u https://doi.org/10.1021/ct900320r  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_15499618_v5_n9_p2265_Tiznado  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15499618_v5_n9_p2265_Tiznado  |y Registro en la Biblioteca Digital 
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